clean set up coming up , info needed

alright , heres the jist if the matter, im attempting my first carpc and as of right now i guess im understanding just as fast as the next newbie but i have a few searches under my belt, But seeing how im viewing this website on a sidekick 2, its kinda hard to go thru all the search pages so freely

........so far this is what im planning ,

seeing how i just bought a new HU that wasnt cheap (lol) and it has perfect subwoofer controls, i plan on keeping in the car. i will have 2 mtx amps installed: Mtx 6004 going to 4 3-way Kappa Perfect Infinity in-cabin(car) speakers & a Mtx 6001 going to two 12" Kappa Perfect Infinity Subs. hopefully by then, i will have purchased an Optima Red or Yellow top also.(battery), plus i will be running a Code Alarm 645 (alarm system with lcd remote & remote start) with that being said, For my pc, this is what i have in mind so far:

as for choosing, i prolly will be using my system for mp3's and movies. mabee Sirius S. radio. plus im keeping my ps2 that is installed now. so will an opus 90 watt be alright or should i just go with the 150w?( and adding things listed below)
also, since i am keeping the HU, and trying to stay in the 90 - 150watt range, what are some good respectable sound cards that i should choose from,
and last, beside an external USB slim combo drive, a case, and cables, what else am i missing from my set- up. thanx for all and any help, suggestions, and/or comments.

One thing to consider is the amount of RAM you have in your plan and whether you are intending the PC to shutdown, suspend or hibernate when you switch the computer off.
If you are planning to hibennate then the entire contents of your memory are written to disk. The more memory, the longer the hibernate and recover time.

I am running with 256MB for this very reason and am running all the apps you are planning to do using XP / MediaCar with no preformance problems whatsoever.

Just because you run more memory doesn't mean that it's a direct 1:1 when you hibernate. Windows only writes whatever is resident in the memory at the time. If you have 512 MB of RAM (like I do) but only have 118 MB actually being used, it'll write to the HD based on that. Even running 512 MB of ram, I come out of hibernation in about 8-10 seconds (including post).

Just because you run more memory doesn't mean that it's a direct 1:1 when you hibernate. Windows only writes whatever is resident in the memory at the time. If you have 512 MB of RAM (like I do) but only have 118 MB actually being used, it'll write to the HD based on that. Even running 512 MB of ram, I come out of hibernation in about 8-10 seconds (including post).

hmmm, perhaps I am making assumptions based on my past experiences with earlier OS's. It used to be that the hibernation file size equated to "total system RAM + Total video RAM +a couple of MB" it may be that XP now compresses the data before storing it, or only stores the locations of memory resident programs.

I did reduce my hibernation time by about 40% by reducing the RAM in my case, however maybe this was because I was running a bloatware application or something that was taking up as much memory as it could?

Just because you run more memory doesn't mean that it's a direct 1:1 when you hibernate. Windows only writes whatever is resident in the memory at the time. If you have 512 MB of RAM (like I do) but only have 118 MB actually being used, it'll write to the HD based on that. Even running 512 MB of ram, I come out of hibernation in about 8-10 seconds (including post).

I see what your saying, but the actual hibernation file will still be as large as your ram. But hibernation does only write to the hiberfile what is in use at the time. So uhh... the end. I don't even know if I'm defending anybody's idea, but I just wanted to put this info out there.